Proprietary, cementitious repair mortars and concretes (pre-extended with coarse aggregate) typically consists of a mixture of the following:

Prepackaged
dry material
, and
Either water or a proprietary liquid component supplied by the manufacturer.

Only preapproved materials listed on the for ,

Concrete Repair Materials

, should be used on TxDOT projects. The includes several repair categories. The Engineer should specify on the plans which category or categories are acceptable in specific applications.

Use neat materials for applications up to 2 inches thick. Use extended materials for repairs exceeding 2 inches.

Some neat materials may be extended in the field with appropriate aggregate. Consult the manufacturer's recommendation for aggregate properties and extension proportions. The repair material MPL differentiates between materials that may be extended in the field, those that are pre-extended, and those that are only approved neat.

Minimum application thickness can vary depending on the material and size of coarse aggregate (if applicable). Consult the manufacturer’s technical data to determine minimum thicknesses when determining minimum acceptable thickness, especially when working with extended materials.

For vertical and overhead repairs, limit lift thickness to 2 inches or the maximum permitted by the repair material supplier, whichever is less. Roughen the surface of materials that will receive subsequent lifts, and ensure substrate is clean and saturated surface dry prior to placing additional repair material.

Shelf life of repair material is critical,

follow manufacturer’s published recommendations for storage including temperature and humidity controls. Do not expose material to the environment for extended periods of time. For projects with greater than 1000 square feet of concrete repair, store material off-site. For short durations, not to exceed three days, prepackaged material may be stored on-site but must be raised off the ground and covered in waterproof tarps. Material exposed to the environment and showing signs of packaging wear should not be used until tested and approved by Materials and Tests Division. Retain manufacturer lot tags with packaged date and shelf life for inspection prior to product use.